DEFORMABILITY OF RUBCON AND FIBRORUBCON BEAMS

Abstract

The study of the deformability of building structures, especially bending elements, is an integral part of
a full study of structures, because it is often the deformability determines the size of the cross section of
the element, to ensure the necessary rigidity of building structures. For beam elements, the most
important during exploitation are vertical displacement – deflections.
For application (especially under the influence of aggressive environment) as a material of production
of the building structures we offer rubber concrete-polymer concrete which has favorable deformation
and strength characteristics, high adhesion to metal surfaces. It is important to note that the composition
of fibrorubcon used industrial waste such as fly ash and fibers steel cord. It was established
experimentally that the strength of fibrorubcon corresponds to the class of high-strength concrete, but
the modulus of elasticity of rubcon corresponds to the modulus of elasticity of traditional concrete. To
study the deformability of rubcon and fibrorubcon bending elements we have made a beam with a
longitudinal reinforcement percentage μ = 0...8.4%.
The beams were tested for pure bending – the most characteristic type of loading for such elements. On
the basis of the tests, a limit on the percentage of longitudinal reinforcement to satisfaction the
requirements of the current standards for maximum deflections of fibrorubcon and rubcon beams was
set.